package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password= DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     * @return
     */
    @Override
    public void  save(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        //通过对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);//前提是属性名必须一致
        //employee.setName(employeeDTO.getName());

        //设置账号的状态
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码 密码为默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //TODO 后期改为当前用户登入的id
        //设置当前记录创建人id和修改人id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //接着调用持久层 让持久层的去插入就可以了
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //select * from employee limit 0,10
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);//通过pagehelper 简化分页查询
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total,records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void starOrStop(Integer status, long id) {
        //本质上其实是修改 员工的状态
        //update employee set status =2 ? where id=?

        Employee employee= Employee.builder()
                        .status(status)
                                .id(id)
                                        .build();
        employeeMapper.update(employee);
    }


    @Override
    public Employee getById(Long id) {
        Employee employee= employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
      //为什么要将employDTO 拷贝到 employ上面?
      //因为之前做的update 方法需要的类型是employ 类型的
      Employee employee=new Employee();
      BeanUtils.copyProperties(employeeDTO,employee);
      //因为是修改操作 所以得去设置下修改时间 修改人
       // employee.setUpdateTime(LocalDateTime.now());
        // employee.setUpdateUser(BaseContext.getCurrentId());//通过拦截器中的LocalThread从浏览器请求体得到修改人id

        employeeMapper.update(employee);
    }
}
